Alexion Pharmaceuticals, Inc. | 439,871 followers on LinkedIn. Transforming Lives, Every Day. | Alexion, AstraZeneca Rare Disease is focused on pioneering new possibilities for the rare disease community. We are driven by a mission to change what it means to live with a rare disease. A leader in rare disease for more than three decades and today continues to build a diversified pipeline across disease areas with significant unmet need, using an array of innovative modalities.